Science a GoGo's Home Page Forums General Discussion General Science Discussion Forum The Great Dying

A computer simulation of the Earth's climate 250 million years ago suggests that global warming triggered the so-called "great dying".

A dramatic rise in carbon dioxide caused temperatures to soar to 10 to 30 degrees Celsius higher than today, say US researchers.

The warming had a profound impact on the oceans, cutting off oxygen to the lower depths and extinguishing most lifeforms, they write in the latest issue of Geology.

So keep it up folks ... http://news.bbc.co.uk/1/hi/sci/tech/4184110.stm
Nothing like fouling your own nest.

"The greatest of all Earth's mass extinctions occurred about 250 million years ago
About 95% of marine species and three-quarters of all families on the Pangean landmass perished".

The fate of our world is unknown. Will it be destroyed by nuclear holocaust, asteroid or comet impact? If this global warming occured 250 million years ago, independent of blungling human interaction, then how much credence can current global warming be pinned upon humanity? Is global warming a natural cycle of the earth's climate; does the earth orbit closer or farther from the sun at times (causing an ice age or global warming)?
What would realistically happen to humanity if an asteroid the size of Texas were to annihilate our biosphere?
Is there any set preparation by our governments for such cataclysmic events or is this far beyond our purview and preclude any measures of preserving humanity?

Sincerely,